post: Move CONFIG_SYS_POST to CFG_SYS_POST

Migrate the rest of the CONFIG_SYS_POST macros over to CFG_SYS_POST
namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/post/lib_powerpc/fpu/acc1.c b/post/lib_powerpc/fpu/acc1.c
index 4cf3b7c..63cc3ee 100644
--- a/post/lib_powerpc/fpu/acc1.c
+++ b/post/lib_powerpc/fpu/acc1.c
@@ -13,7 +13,7 @@
 
 GNU_FPOST_ATTR
 
-#if CFG_POST & CONFIG_SYS_POST_FPU
+#if CFG_POST & CFG_SYS_POST_FPU
 
 static double func (const double *array)
 {
@@ -36,4 +36,4 @@
 	return 0;
 }
 
-#endif /* CFG_POST & CONFIG_SYS_POST_FPU */
+#endif /* CFG_POST & CFG_SYS_POST_FPU */